Address comments an fix flake8 warnings

Author: Luke Luong

microsoft/testsuites/vm_extensions/azureperformancediagnostics.py

@@ -26,9 +26,9 @@
 from lisa.sut_orchestrator import AZURE
 from lisa.sut_orchestrator.azure.common import (
     AzureNodeSchema,
+    add_system_assign_identity,
     check_or_create_storage_account,
     get_node_context,
-    add_system_assign_identity,
     list_blobs,
 )
 from lisa.sut_orchestrator.azure.features import AzureExtension
@@ -60,7 +60,7 @@ def before_case(self, log: Logger, **kwargs: Any) -> None:
          storage account key, which we cannot use currently.
         Will change it back once the extension works with MSI.
         """,
-        priority=5,
+        priority=1,
         requirement=simple_requirement(
             supported_features=[AzureExtension],
         ),
@@ -92,8 +92,12 @@ def verify_azure_performance_diagnostics(
         )
 
         # Assign system identity to VM
-        # This MSI will be pre-configured with the necessary role assigments to Storage Account from Subscription level
-        # Permissions required: Storage Account Contributor, Storage Blob Data Contributor, Storage Blob Data Contributor
+        # This MSI will be pre-configured with the necessary
+        # role assigments to Storage Account from Subscription level
+        # Permissions required:
+        #   Storage Account Contributor
+        #   Storage Blob Data Contributor
+        #   Storage Blob Data Contributor
         add_system_assign_identity(
             platform=platform,
             resource_group_name=node_context.resource_group_name,
@@ -119,7 +123,7 @@ def verify_azure_performance_diagnostics(
 
         protected_settings = {
             "storageAccountName": storage_account_name,
-            "authenticationType": "SystemManagedIdentity"
+            "authenticationType": "SystemManagedIdentity",
         }
 
         extension_result = extension.create_or_update(
@@ -174,7 +178,8 @@ def _is_supported_linux_distro(self, node: Node) -> bool:
             Suse: [12, 15],
             SLES: [12, 15],
             AlmaLinux: [8],
-            CBLMariner: [2, 3], #AzureLinux uses CBLMariner class
+            # AzureLinux uses CBLMariner class
+            CBLMariner: [2, 3],
         }
 
         for distro in supported_major_versions: